Rearward transfer mechanism for ten key calculating machines



y 1966 o. HABERKORN 3,260,447

REARWARD TRANSFER MECHANISM FOR TEN KEY CALCULATING MACHINES Filed Feb. 17, 1964 5 Sheets-Sheet 1 Fig.7

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REARWARD TRANSFER MECHANISM FOR TEN KEY CALCULATING MACHINES Filed Feb. 17, 1964 5 Sheets-Sheet 2 IN VEN TOR July 12, 1966 o. HABERKORN REARWARD TRANSFER MECHANISM FOR TEN KEY CALCULATING MACHINES Filed Feb. 17, 1964 5 Sheets-Sheet 3 Dun-DOUGH DDDDDDDD HDDDDDDD UUHUDDDD DUDE-HEDGE DDn-DDDDDD BDDDDDDDD Giulia-OD nDn-DDDDD HDDDDDDU Quin-GOOD :DDDDDHDH BDDDDDDD HHDUDDDDG DDDDDDBUD BHDDDDHD Eh Dun-DEED J I I H IH July 12, 1966 o. HABERKORN 3,260,447

REARWARD TRANSFER MECHANISM FOR TEN KEY CALCULATING MACHINES Filed Feb. 17, 1964 5 Sheets-Sheet 4 //v VEN TOR.-

July 12, 1966 o. HABERKORN 3,260,447

REARWARD TRANSFER MECHANISM FOR TEN KEY CALCULATING MACHINES Filed Feb. 17, 1964 5 Sheets-Sheet 5 E P lal T IN VE N TOP WM MWMQW United States Patent 3,260,447 REARWARD TRANSFER MECHANISM FOR TEN KEY CALCULATING MACHINES Otto Haberkorn, Gerstetten, Wurttemberg, Germany, as-

signor to Walther-Buromaschinen G.m.b.H., Gerstetten, Wurttemberg, Germany Filed Feb. 17, 1964, Ser. No. 345,423 Claims priority, applicatigzloGermany, Mar. 6, 1963,

22 Claims. (Cl. 235-60) machines, and to make such machines more convenient to I operate.

It is an object of this invention to make the performance of the entire rearward transfer function, including the introduction of totals into the pin carriage, after depressing a functional key, to be entirely automatic and hence also accelerated.

Another object of this invention is to provide means for using this special rearward transfer mechanism for effecting also a decade shifting of the rearwardly transferred amount relative to the transfer members, and to increase by unity the digit in the lowest position of the amount taken up by the adding mechanism if, in consequence of the decade shifting, digits have been cut off from from the right hand side of the amount, and the digit immediately to the right of the lowest digit in the amount that has not been cut away is greater than 5.

In order to achieve these objects, the present invention provides in the pin carriage, besides the group of pins which cooperate with amount keys in the known manner, also a second group of settable pins which are in direct cooperation with the differential actuator members and which, in accordance with the settings of the differential actuator members which the latter have acquired during summation from the adding mechanism, prepare the pins for resetting the differential actuator members into the same positions during the next machine movement.

The result of such a contrivance is that it eliminates the necessity for a special counting mechanism including a resetting device, a storage device or the like, and also renders unnecessary any intermediate manual operations, the entire rearward transfer operation being performed automatically after depressing the rearward transfer key.

According to this invention the second group of settable pins is positioned adjacent the left end of the first group, and when the machine is at rest it will be at the left side of and adjacent to the line of action of the feet of the amount keys, and with its rows of settable pins in alignment with the differential actuator members.

A special feature of this invention is that, when the machine is at rest, the settable pins of the first group are yieldably held in a known manner in an upper layer so that when the amount keys are depressed the pins will project partly from the lower side of the pin carriage to form abutments for the differential actuator members, while the settable pins of the second group are yieldably held in the path of switching members connected to the differential actuator members and movable transversely thereto, and the settable pins which are to the left of the amount registered by the adding mechanism are moved out of the abutment levels so as to expose the pins cor- 3,Z,447 Patented July 12, 1966 responding to the amount from the adding mechanism for stopping the differential actuator members.

The abutment surfaces of the switching members are engaged by lifting surfaces of a length corresponding to the length of the rows of settable pins by which, during the transverse movement of the switching members in the direction of the pins, those pins which are in front of those which correspond to the places to be occupied by the differential actuator members, will be moved out of the path of the abutment surfaces of the switching members.

The lifting of the settable pins of the second group is effected by the switching members which are hingedly connected with the switching members, and by means of suitably controlled articulated joints.

Further details and advantages of this invention will become apparent from the following detailed description and the accompanying drawings wherein:

FIGURE 1 is a plan view of the machine showing the arrangement of keys;

FIGURE 2 is a vertical longitudinal cross-section of the machine;

FIGURE 3 is a plan view of the machine after removal of the cover;

FIGURE 4 is a front elevation showing the settable pin carriage as viewed in the direction of the arrow IV-IV of FIGURE 3; and

FIGURE 5 is a front elevation showing the settable pin carriage as viewed in the direction of the arrow V-V of FIGURE 3.

General construction of the calculating machine The calculating machine in which the present invention is contained comprises: an array of ten keys 10 (FIG- URE 1) with the digital value keys 1-9, a zero key 11 for the introduction of amounts, several function keys, such as an addition key :12, a repetition key 13, a subtraction key 14, a summation key 15, an intermediate summation key 16, a multiplication key -17, a multiplicand key 18, as well as a rearward transfer key 19 and a decade shifting key 20. The digital keys l-9 operate in a known manner through key lever 21 (FIGURE 2) upon the settable pins 22 (FIGURE 3) of a first group of pins on a pin carriage 23, the pins for the values 1-8 being arranged in rows extending longitudinally of the machine. The value 9 is in the form of a rigid bar 24 (FIG- UR E 2) which is common to all positions.

The pin carriage 23 is transversely slidable along two guide bars 25 (FIGURES 2 and 3) so that it can have its rows of settable pins 22 positioned successively under the feet 26 of the individual digit keys 1-8 which are positioned along the dot and dash line 27 (FIGURE 3).

The pin carriage 23 is urged to the left by a tension spring 28 (FIGURE 3) and is provided with a mechanism of known construction including the rack 29 (FIG- URE 3) for moving the carriage transversely step by step. By means of this mechanism the pin carriage is shifted one step to the left every time a digit key 10 or the zero key 11 is depressed. In this manner the successive rows of digit keys 22 are positioned over the line 27 of digit key feet so that when a key is depressed, the corresponding settable pin 22 will be moved downwardly (FIGURE 2). After .all the digit keys that make up the amount to be entered have been depressed, the pin carriage (FIGURE 3) will havebeen moved to the left of its initial position a number of steps corresponding to the number of digits in the amount that has been entered.

When a key 10 is depressed, the corresponding settable pin 22, which is in an upper inactive position when the machine is at rest, will have its lower end projected downwardly from the carriage. The settable pins 22 act in conjunction with the abutment surfaces 31 of switching members 32 (FIGURE 2), each of which is hingedly connected to a differential actuator member 34 by means of a stud 33. Each of the differential actuator members 34 has two slots 36 by which it is supported on transverse bars for movement longitudinally of the machine. Along their narrow upper rear edges the members 34 are provided with rack teeth 37 which are continually in mesh with intermediate gears 38 rotatable on a stationary transverse axis and meshing with toothed sectors of digit type wheels 41, the latter being rotatably mounted on levers 42 pivoted on a stationary axis 43 and urged in clockwise direction in FIGURE 2 by a tension spring 44. The levers 42 carrying the digit type wheels 41 are kept in their resting positions by retraction bar 45 carried by the free ends of swinging arms 46 fastened to the stationary axis 43. The frame which comprises the bar 45, the axis 43 and the arms 46 is connected through a con trol link 48 with a roller lever 49 which is acted upon by two cams 51, 52 secured to the main drive shaft 51 so as to cause the retraction bar 45 to swing back and forth during each movement of the machine.

Each of the differential actuator members 34 (FIG URE 2) carries a relatively movable toothed rack 54 which cooperates with an accumulator means or counter 55 comprising addition and subtraction wheels 56, 57 which, after .a corresponding pivotal movement of the counter 55 upon its pivot axis 58, are brought into or out of mesh with the rack 54 by setting mechanism actuated by the main drive shaft 51 at certain times correspond ing to addition, subtraction, summation or intermediate summation operations. Such switching mechanisms are generally known and are not described further.

The toothed rack 54 is a member of the decade switching mechanism. This rack is guided by a pin 61 extending into a slot 59 in the differential actuator member 34 while the spring 62 urges it to the left while being kept in proper position by a bent portion 63 bearing against the lower end of the tensioning lever 64.

The tensioning lever becomes fixed when its upper end, under the influence of the spring 64, engages the shoulder 65 of a lever 66 which cooperates with the decade teeth 69, 7 1 of the associated addition and subtraction counting wheel 56, 57 through anti-decade teeth 67, 68. The switching members 32 are acted upon by tension springs 72 whose right hand ends are connected to a transverse plate 73 to urge the switching members 32 and the differential actuator members 34 to the right. Such movement however is limited by a transverse gathering bar 74 carried by arms 76 mounted on a shaft 75 for engaging the shoulders 77 of the differential actuator members 34. The arms 76 carry rollers 78 which are acted upon by a cam disk 79 on the main drive shaft 51. During every revolution of the main drive shaft 51 in the counter-clockwise direction in 'FIGURE 2, the gathering bar 74 during the first par-t of the machine cycle is swung into dot-dash position 74' and during the remaining half revolution of the shaft 51 it is returned to its initial position.

During a machine cycle which has been initiated by the addition key 12 (FIGURE 1) the differential actuator ,members 34 (FIGURE 2) are released by swinging of the gathering bar 74 into position 74' so that they can be moved to the right by the pull of the springs 72 whereby the abutment surfaces 31 will strike upon the downwardly directed pins 22. The switching members 32, together with differential actuator members 34 are thus moved over distances corresponding to the digits whose keys have been pressed.

After setting of the differential actuator members 34 together with the toothed racks 37, '54 to an amount corresponding to the depressed keys, an adjusting rail 81 (FIGURE 2) is bnought down into mesh with the intermediate gears 38 whereby the latter, as well as the differential actuator members 34 together with the switching 4 members 32, are adjusted to the required value and held in that position.

The adjusting rail 81 is constructed in such a manner that it will be positioned over the spaces between the teeth of the intermediate gears 38, and by entering into.

such spaces will rotate the gears 38 through a small angle so as to move the members 34, 32 to the left, thus providing sufficient clearance between the abutment surface 31 and the settable pins 22, 86 to permit the lowering and lifting of the members 32. Thereafter the retraction bar 45 will release the digit wheel levers 42 so that the latter, after being further released by other locking means, will strike with the digit carrier 41 upon the sheet 40 (FIG- URE 1) on which the amount is to be printed. The digit wheel levers 42 are then returned to their original position shown in the drawing so as to permit the retraction bar 45 to be moved back, the toothed sectors of the digit wheels being thereby again brought into mesh with the intermediate gear 38.

During the movement of the gathering bar 74 during the first half of the machine cycle the dot-dash position 74' is reached, the counter will remain disengaged from the toothed racks 54, but then, before the return movement of the gathering bar into the solid line position 74, the counter will be brought into mesh with the toothed racks 54, and during the rearward movement of the switching members 34 the enmeshed digital wheels 56, 57 will be rotated to the amount that has been entered.

If, during this addition, there occurs a decade transfer from 9 to O, or during subtraction from O to 9, the decade tooth 69 or 71 will encounter the anti-decade tooth 67 or 68 so that the anti-decade lever 66 will be given a short swing in the clockwise direction which will cause the tensioning lever 64 to disengage the shoulder 65 so that the force of the spring can be given to the bent portion 63 and the toothed rack 54 will be shifted into the next higher position so that the gear 56 or 57 which is in mesh with the toothed rack 54 will be rotated one decade further, in addition to the rotation which was imparted to it during the return movement of the differential actuator member 34.

If the amount that has been entered into the counter 55 is to be printed, the summation key 15 (FIGURE 1) is depressed, whereby the switching members 32 are swung downwardly about their pivotal mountings 33, and far enough so that their abutment surfaces 31 will be moved out of the range of the settable pins 22. For this purpose the switching members 32 are guided. by a guide rod or bar 83 which passes through slots 82 in these members. The guide bar 83 is carried by two arms secured to a stationary shaft 84 in such a manner that the members 83, 84 and 85 form a rigid swingable frame 85.

In order to swing the switching members 32 downwardiy this frame 85' is swung into the clockwise direction in FIGURE 2 by depressing the summation key 15 or by other devices to be described hereinafter. At the same time the counter 55 will be moved into mesh with the toothed rack 54.

When, additionally, in the first half of the machine cycle, the gathering bar 74 is moved to the right, the differential actuator members 34 will be drawn by the tensions of the springs 72 until the decade teeth 69 or 71 encounter the anti-decade 67 or 68, whereby the addition Wheels 56 will be brought into their null positions and the differential actuator members 34 as well as the type wheels 41 will be shifted a number of unit spaces corresponding to the amount that was contained in the adding mechanism, while the digit wheels 41 will be positioned for printing the amount.

There occurs then in the described manner the printing of the sum, followed by the swinging back of the digit wheels 41 into mesh with the intermediate wheels 38 and, at the same time, the disengagement of the counter 55 from the rack teeth 54, as well as the return of the differential actuator members 34 together with the switching members 32 by the gathering bar 74. The switching members 32 are then again swung into their upper position by upward movement of the guide rod 83 so that the abutment surfaces 31 will be in position to encounter the lower portions of the downwardly projected settable pins.

If the intermediate summation key 16 was depressed, there will be the same sequence of events, but with the difference that the counter 55 will remain in mesh with the toothed rack 54 during the second half of the cycle so that during the return of the differential actuator members 34 the digit wheels of the counter 55 will be returned to the positions that they occupied at the beginning of the cycle and thereby retain the sum therein.

Seltable pins for rearward transferring The mechanism that has been described thus far is known. In order now to return to the pin carriage 23 the amount that is present in the counter, and to use it for further calculations, especially to obtain with a previously introduced multiplier a multiple product which will remain in the machine for future use, the following additional devices are built into the machine.

As shown in FIGURE 3, to the left of the group of settable pins 22 there is another group 86 of such pins which are arranged similarly in rows that cooperate with the differential actuator members 34 and their associated switching members 32 and with the rows spaced the same distance from one another as the differential actuator members.

As shown in FIGURE 5, the settable pins 86 in their resting positions occupy a lower level by projecting downwardly from the pin carriage, and are then at the same level as the abutment surfaces 31 (FIGURE 2) and the lower ends of the pins 22 which have been projected downwardly by the depression of the digital keys 10.

For'introd-uciug upon the pins 86 the amount contained in the counter 55, which amount is to be transferred to the switching members during subsequent machine cycles, a certain number of these pins are moved upwardly into the dotted line positions 86 in FIGURE 5.

This is done by horizontally bent lifting surfaces 87 (FIGURE 5) joining at their left the abutment surfaces 31 (FIGURE 2) and which are first brought into the dotted line positions 87 below the settable pins 22 and 86 by the setting movement of the differential actuator members 34.

As during sum withdrawal, the differential actuator members 34 (FIGURE 2) are then set by the amount in the counter, whereby the lifting surfaces 87, which are limited by the abutment surfaces 31, are set beneath the pins 86 all of which are in their lowered positions. Then by upward movement of the guide rod 83 all the lifting surfaces 87 are moved upwardly by means of the switching members 32 whereby the settable pins 86 in their path are carried along into their upper positions and are moved out of the path of the abutment surfaces 31.

The foremost settable pin 86 of each row which is not moved upwardly corresponds to the digit in the corresponding place in the counter. It serves the same function as a pin 22 which has been projected downwardly by the corresponding key to form an abutment for the abutment surface 31; when, during a subsequent machine cycle, the amount is to be brought again into the switching members for further calculations.

For this purpose the following devices are provided. At the ends of the guide rod 83 arms 89 are attached (FIGURES 2 and 4) and are pivotally connected by the pivot bar 91 to the arms 92 of angular levers 93 which are attached to the ends of a shaft 94 that is journalled in the machine frame. The arms 89 in conjunction with the arms 92 form knee joints which in the positions shown are somewhat beyond their dead centers in their extended formations. They are retained in this position by having their pivot bar 91 encounter a shoulder 95 of a blade 96, and in such a manner that the switching members 32 are safely guided in their upper working positions by the guide rod 83 in the slot 82.

The blade 96 is pivotally connected by means of a stud to a key lever 97 (FIGURE 4) mounted on a bar 99 for the rearward transfer key 19 and is urged clockwise -by a spring 98. The blade 96 catches behind the .pivot bar 91 of the knee joint by means of the shoulder 95. If the knee joint is in the extended position shown in FIGURE 2, and if the rearward transfer key 19 is then depressed, the lower end of the key lever 97 will move to the left so that the blade 96 will take the pivot bar 91 with it by means of the shoulder 95 so as to bring the knee joint across dead center.

This will also cause the guide bar 83 to be lowered so as to swing all the switching members 32 downwardly, and in such a manner that their abutment surfaces 31 are moved downwardly below the level of the downwardly projecting settable pins 86 and the lifting surface 87 will be established under the settable pins 86 as indicated by dotted lines at 87.

A second means for straightening and setting the knee joint can be in the form of a pull rod 101 (FIGURE 2) which has a slot surrounding the pivot bar 91 and which is pivotally connected at 103 with the roller lever 104 whose roller 105 is acted upon by a cam disk 106 of the main drive shaft 51, the pull rod being urged toward the cam disk by a spring 107.

In order to be able to return the pin carriage 23 to its initial position (FIGURE 3) during the return movement of the differential actuator members 34 unhindered -by cooperation of the abutment surfaces 31 with the set table pins 22, 86, so that during the second half of the machine cycle the introduction of the amount for the second cycle can be commenced, the pull rod 101 is moved to the left away from the cam disk 106 soon after the adjusting rail 81 is swung down, whereby the knee joint 89, 92 will be moved into its buckled position by engagement of the right hand end of the slot 102 with the stud 91, the abutment surfaces 31 being thereby moved downwardly out of the path of the pins 86.

A third means for straightening the knee joint consists of a projecting stud 108 on the side of the pull rod 101 for engaging an arm 109 of the angular lever 93. The stud 108 has linked to it a roller lever 111 pivotally mounted on a stationary bar 113, the roller being acted upon by a cam disk 114 on the main drive shaft 51.

Shortly before the end of a revolution of the shaft 51 in counter-clockwise direction, the roller 113 will be lifted by the cam disk 114 so as to lower the stud 108 and so that the arm 109, after having been moved under the stud 108 while the knee joint was sprung to the left, will be swung clockwise whereby the knee joint will again be tensioned.

A fourth means for actuating and especially for tensioning the knee joint 89, 92 consists of a pull rod 115, which by means of a pivot pin 116 is connected to the roller lever 49 for actuating the retraction bar 45 for the pivoted type lever 42. At its left hand end the pull rod (FIGURES 2 and 4) carries a stud 117 for engaging the lower narrow surface 118 of a projecting arm 119 at the lower end of the key lever 97 for the rearward transfer key 19, and is provided with a shoulder 121 for engaging a'laterally projecting stud 122 on the arm 92. The spring 98, whose lower end is connected to the pull rod 115, urges the stud 117 upwardly against the narrow surface 118, whereby with the key lever 97 in its resting position shown in FIG- URE 2, the shoulder 121 of the pull rod 115 will be kept disengaged from the stud 122 to the straightened knee joint so that it will not bring the knee joint into tensi-oned position.

Levelling of the rearward transfer pins In order to return to their lower positions those settable pins 86 which have been moved upwardly by the lifting surface 87, namely to level them, a levelling plate i120 ('F'IGUR'ES 2 and 5) is provided which is carried by arms 12 3 pivotally mounted on a bar 125 carried by lbrackets 124. The levelling plate 120' is urged upwardly by a spring 126 to keep it out of the way of the upwardly projected pins 8 6. The plate 120 is arranged to cooperate with the nose 127 of a pawl 128 which by means of a stud 129 is pivotally connected to an upright connecting rod 131. The rear edge of the pawl has a bent portion 133 connected to a spring .132 for urging it against the rear edge 134 of the connecting rod, the latter being provided with a slot at its upper end for guiding it on a stationary bar 136 while its lower end is pivotally connected at 137 with the roller lever LL11. A finger 138 of the pawl 128 has a laterally bent end 139 for actuation by the end 141 of the horizontal arm of the key lever 97 for the rearward transfer key 19.

If the roller lever 11 1 is given a short counterclockwise swinging movement by the cam disk 114 when the shaft 51 begins to rotate for an addition or subtraction process, the connecting rod 131 will be moved downwardly and back again whereby the levelling plate 120 will be carried downwardly by the nose 127 to return to their lower resting positions those pins 86 which have been moved into elevated positions.

If, for example, at the beginning of a machine cycle the rearward transfer key 19 is depressed, the end 14 1 of the key lever 97 will come down upon the bent portion 139 so as to swing the pawl 128 counterclockwise against the tension of the spring 132 and thus bring it out of the range of the plate 120 so that as long as the key 19 remains depressed, the upwardly projected settable pins 36 will not be pushed down.

Machine cycles of the calculating machine with rearward transfer mechanism (a) Addition-Before commencement of the cycle the machine will be in the resting position shown in FIG- URES 2 and 3. The pin carriage 2 3 will be in its resting position toward the right of FiIGURE 3 where the row of pins 22 at the extreme left will be under the feet 26 under the digit keys in the line 27, the rows of settable pins 86 in juxtaposition with the differential actuator members 34, the counter 55 (FIGURE 2) disengaged, and possibly with an amount registered therein, the switching members 32 and the differential actuator members 34 in their resting positions, and the knee joints 89, 92 in tensioned position. By then successively depressing the digital keys 10 and the zero key 11 in the amount to be entered, beginning with the highest place in the amount, the settable pins 22 that correspond to the amount to be entered will be projected downwardly into the path of the abutment surfaces 31, whereby after each depression of a key the pin carriage will be shifted stepwise one place to the left (FIGURE 3) so that the projected pins 22 will be brought into the paths of the .diiferential actuator members 34 while the rows of settable pins 86 are being moved to the left out of the range of the differential actuator members 34.

If by the depression of the addition key 12 FIGURE 1) the machine has been started, then by swinging the gathering bar 74 (FIGURE 2) out to the right, the differential actuator members 34 and the switching members 32 with their abutment surfaces 31 will be drawn up against the projected settable pins 22, by the springs 72, and the setting fixed by bringing the adjusting rail 81 into mesh with the intermediate gears 38 whereby the abutment surfaces 31 will be spaced slightly from the pins 22.

After the buckling of the knee joint 89, 9'2 and the lowering of the switching members 32 out of the range of the settable keys 2-2, by movement of the pull rod 101 to the left, there will follow the printing of the amount, the movement of the counter 55 into engagement with the differential actuator members 34 and the swinging back of the digit type wheels 41 into mesh with the intermediate gears 38. When the second half of the machine cycle commences, the gathering bar 74 will be swung to the left and the differential actuator members 34 into their null positions, while at the end of the cycle the knee joint 89, 9 2 will be stretched by rearward movement of the stud 108 into engagement with the arm 109 when the roller lever 1-11 is swung by the cam disk.

Since the switching members 3 2 after fixation of the differential actuator members 34 at the end of the first half of the machine cycle are moved out of the level of the settable pins 22, 86, the pin carriage 23 at this time will be released for its return to its resting position at the right (FIGURE 3) so that during the second half of the machine cycle a new amount can be introduced for the next machine cycle.

During the return movement of the pin carriage 23 the downwardly projecting ends of pins 22 will encounter the inclined surface of a deflector ledge 142 (FIGURE 5) which will return the pins to their original positions. The mount now introduced is added to the amount already in the counter. At the end of the cycle the connecting rod 131 is moved downwardly over the roller lever 111 whereby the nose 127 of pawl 128 will swing the levelling plate 120 downwardly upon the pins 86 while the stud 108 by acting upon the arm 109 will bring the knee joint 89, 92 into its tensioned position. All the parts will then be in their initial positions as at the beginning of the cycle.

(b) Summation-If the machine cycle is started by depressing the summation key 15 or the intermediate summation key 16, the key carriage 23 will remain in its resting position. The summation key 15 and the intermediate summation key 16 has each associated with it a key lever 143 or 144 (FIGURE 4) each key lever having pivotally mounted on it a spring urged blade 96 or 96", corresponding to the blade 96 for cooperation with the knee joint pivot bar 91. By depression of one of the two summation keys the knee joint 89, 92 is brought by the blades 96' or 96 into its buckled position and thereby the switching members 32 are also brought down from the level of the abutment pins 86 into their lower levels.

At the beginning of the machine cycle the counter 55 is brought down into mesh with the toothed rack 54. This is followed by the release of the differential actuator members 34 by swinging of the gathering bar 74 to the right, so that differential actuator members 34 will be shifted to the right by springs 72 until by encountering the decade teeth 69 or 71 they will be stopped by antidecade teeth 67, 63. By bringing the adjusting bar 81 down into mesh with the intermediate gears 38, the differential actuator members 34 and the digit type wheels 41 will be held accurately in their set positions.

There follows then the printing of the amount contained in the digit type wheels 41 and the return of these wheels into mesh with the intermediate gears 38 and the disengagement of the counter 55. The movement of the pull rod 101 at the end of the first half of the machine cycle does not do anything because knee joint 89, 92 is still in its buckled position. Its tensioning occurs at the end of the machine cycle by action of the cam disk 114 upon the roller lever 111 causing the stud 108 to swing the lever arm 109. Movement of the pull rod is 9 r also without effect on the knee joint because the rod 115 acts only upon the key lever 97. An intermediate summation machine cycle occurs in a similar manner, but in that case the counter is not disengaged from the differential actuator members until the end of the second half of the machine cycle.

Rearward transfer.The steps that have been described for obtaining a sum are also in part applicable to a rearward transfer cycle. The pin carriage 23 will then remain in its resting position. The rows of settable pins 86 will then be in the planes of the switching members 32 which will be brought into lowered positions by buckling of the knee joints 89, 92. There also occurs a cessation of the levelling of the settable pins 26 as long as the rearward transferkey 19 remains depressed, and the pressing of the lifting surface 87 against the settable pins 86 from beneath by tensioning or buckling of the knee joint.

By the rearward transfer, as already mentioned, the amount contained in the counter is to be taken over by the group of settable pins 86 in such a manner that the same amount can be taken up again from these pins by the differential actuator members 34.

For this purpose, by depression of the rearward transfer key 19 (FIGURE 2) the key lever 97 will be swung clockwise whereby its end will encounter the bent portion 139 of the pawl 128 which will be swung counterclockwise thereby so as to prevent the pins 86 from being levelled at the end of this movement.

After the nose 127 has by-passed the right hand edge of the levelling plate 120, the nose will remain in its diverted position as long as pressure is applied to the rearward transfer key 19 so that the downward movement of the connecting rod 131 which is effected by the roller lever 111 will not impart any levelling action to the plate 120 as long as the key 19 remains depressed. The swinging of the key lever 97 by depression of the key 19 will, as has already been stated, cause buckling of the knee joint 89, 92 by means of blade 96, whereby the abutment surfaces 31 will be moved out of the level of the settable pins 86.

At the beginning of a machine cycle, as when a summation cycle is commenced, the counter 55 is immediately brought into mesh with the toothed rack 54 and the differential actuator members 34 are set upon the amount contained in the counter because when the gathering bar 74 moves to the right the decade teeth 69 or 71 of the counting wheels are moved up to the anti-decade teeth 67, 68 and are then fixed in such position by bringing the adjusting rail 81 into mesh with the intermediate gears 38.

By swinging the key lever 97 clockwise the sliding surface 118 is moved out of the range of the stud 117 so that the pull rod 115 under the action of the spring 98 will bring its shoulder 121 into engagement with the stud 122. If the pull rod 115 at the end of the first half of the machine cycle is moved to the right, then the stud 122 of arm 92 which has been buckled to the left will be encountered by the shoulder 121 whereby the knee joint 89, 92 will be returned to its tensioned position. This will cause the guide bar 83 to move the lifting surface 87 from the bottom upwardly against the downwardly projected ends of the settable pins 86. Those pins which reach into the range of the lifting surface 87 will thereby be moved upwardly so that, as has already been stated, in each row the foremost pin 86 that has not been pressed upwardly will be able to serve as an abutment for the respective abutment surface 31.

Decade shifting as well as ofl and up rounding Before the amount that has been taken during a certain machine cycle from the counter can be taken from the pins 86 (FIGURE 5) the pin carriage can be given a desired decade shifting to the right. The left hand rows of settable pins 86 will thereby be moved to the right beyond the range of the differential actuator members 34 whereby in place of the pin rows 86 at the left, there is presented a fixed abutment 86" on the pin carriage 83 while at the right the pin rows 86 are not available for transfer of the amount contained therein. This means that there occurs here a rounding off of the introduced amount. Such a decade shifting can, for example, occur when the capacity of the machine is inadequate for registering a multiple product.

In order that the places at the right which have been rounded ofi in that manner will be simultaneously rounded up, there is provided, alongside the outermost differential actuator member 34 (FIGURE 3) also an additional differential actuator member 34' to function as a rounding up member with which is associated a switching member 32' corresponding to the switching members 32. This member 32' acts through an abutment surface 31 with the row of settable pins which will be in the operating lines IV and 27 while the pin carriage is in its resting position. The additional member 34' has pivoted to it by means of a stud (FIGURES 2 and 3) a rounding oif blade 146 with a spring 147 to urge a bent portion 148 of the blade upon the upper edge of the member 34', and which presents a shoulder 149 which, after the introduction of a value of 5 or more, will slide over a projection 150 on the lever 66 which was directed to the last counted place.

When the differential actuator members 34 are brought back by movement of the gathering bar 74 to the left, the additional member 34' will also be returned with them, whereby the shoulder 149 will hook behind the projection 150 and impart to the lever 66 a clockwise swinging movement by which the associated tensioning lever 64 will be disengaged with consequent disengagement of the toothed bar 54' that is associated with the first differential actuator member 34, so that the lowermost toothed gear 56 or 57 which is in mesh with the toothed bar 54' will be moved one unit further.

This means that when in the additional switching member 34' five or more units are introduced, the digital amount of the differential actuator member 34 following at the left, namely, the differential actuator member which is associated with the lowest place in the counting mechanism, will be moved upwardly one unit, so that besides the rounding off, there will also be a rounding up.

It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions and accordingly, it is desired to comprehend such modifications within this invention as may fall within the scope of the appended claims,

What is claimed is:

1. A calculating machine comprising in combination; a frame, a ten key keyboard having numeral keys therein, a pin carriage shiftably mounted in said frame beneath said keyboard, a first and a second group of rows of settable pins mounted in said pin carriage and the pins of said first group being adapted to be actuated and set by said numeral keys, accumulator means, a mechanism for each row of the pins of said first group of pins operable to transmit the representation of digits from the set pins of said first group of pins to said accumulator means and also operable to transmit the representation of digits in the accumulator means therefrom to said second group of pins, each said mechanism comprising a differential actuator member operatively associated with said accumulator means and a switching member connected thereto, abutment means on said switching members adapted to engage set pins of said first group of pins for determining the actuated position of each said mechanism during a machine cycle, means on said switching member for setting the pins of a row of said second group of pins in conformity with the actuated position of the pertaining mechanism, and means for actuating said mechanisms.

2. The machine as claimed in claim 1 further comprising an actuating station from which said first group of pins is actuated by the pertaining keys, said first group of pins being to the right of, and said second group of pins being to the left of said station when the machine is at rest, and said rows of the second group of settable pins being above and in vertical alignment with the pertaining switching members when the machine is at rest.

3. The machine as claimed in claim 2 in which the pins of said first group are yieldingly held in an upper position in said pin carriage and are adapted to be selectively projected downwardly from the underside of said pin carriage by depression of the pertaining numeral key, said second group of pins being yieldably held in a lower position in said pin carriage, said abutment means pertaining to said switching members being adapted to abut against unset pins of said second group of pins, and means on said switching members to urge selected pins of said second group upwardly to enable said abutment means to abut against unset pins of said second group which correspond to the representations of digits in said accumulator means.

4. The machine as claimed in claim 3 in which said means on said switching member comprise lifting surfaces thereon of the same length as the said rows of said second group of pins, and means for effecting movement of said switching members in a vertical plane toward said second group of pins when said mechanisms are in actuated position whereby said selected pins of said second group of pins will be urged upwardly out of the paths of said abutment means.

5. The machine as claimed in claim 4 in which said switching members have slots therein, guide bar means inserted through said slots to enable said switching members to be reciprocated thereon, knee joint means supporting said guide bar means and adaptable to collectively raise said switching members whereby to lift the said lifting surfaces thereon when the knee joint means is tensioned and thereby raise pins of said second group upwardly and thereby transfer to said second group the representations of digits in said accumulator means.

6. The machine as claimed in claim 5 further comprising; an add key and a subtract key, a levelling plate pivotally mounted above said second group of pins, and means interconnecting said add and subtract keys and said levelling plate so as to lower said plate upon the pins of said second group and reset the same when said add key and subtract key is selectively actuated.

7. The machine as claimed in claim 6 further comprising: additional keys in the form of a repetition key, a rearward transfer key, a summation key, and an intermediate summation key, and means operatively connecting said additional keys to said plate and responsive to actuation of said additional keys to prevent the lowering of said levelling plate so that the representation of digits which are registered in the pins of said second group can be repeatedly delivered by said mechanism to said accumulator means.

8. The machine as claimed in claim 7 in which said means connecting said additional keys to said levelling plate comprises a plate actuating pawl having a nose which engages said leveling plate and which nose is disengaged from said levelling plate by the selective actuation of said additional keys to prevent said levelling plate from being lowered by said pawl.

9. The machine as claimed in claim 8 further comprising: a main drive shaft means, means interconnecting said pawl and said drive shaft means for causing said pawl to lower said levelling plate after said switching members return to their rest positions.

10. The machine as claimed in claim 9 in which said knee joint means has tensioned and buckled positions and comprises a pivot bar and upper and lower link joined by said pivot bar, said upper link being pivotally joined to said guide bar means, hook bar means adapted to catch over said pivot bar, key operated lever means responsive to actuation by said additional keys having one end pivotally connected to said hook bar means adaptable to 12 permit said knee joint means to move to its buckled position when said additional keys are selectively actuated.

11. The machine as claimed in claim 10 in which said knee joint means further comprises a stud on said lower link, pull rod means having a pull link havinga shoulder 1 thereon, said shoulder cooperating with said stud on said lower link to bring said knee joint means into its tensioned position by a pull from said pull link.

12. The machine as claimed in claim 11 in which said key operated lever means has a sliding surface thereon,

said pull rod means further comprising a stud on said pull link which cooperates with said sliding surface on said lever means to keep said shoulder on said pull link normally out of engagement with the stud on said lower link of said knee joint means whereby upon the selective depressing of said additional keys, said shoulder on said pull link is caused to engage said stud on said lower link to tension said knee joint means by the pull from said pull link.

13. The machine as claimed in claim 12 further comprising a second pull link having a slot at one end thereof, said pivot bar being slidably retained in said slot, the other end of said second pull link being connected to said main drive shaft means to tension said upper and lower links at the beginning of the machine cycle during addition, said second pull link having a stud thereon, said lower link of said knee joint means having a lower end pivotally mounted in said machine and arm connected to said lower end and extending therefrom, roller lever means pivotally supported in said frame and having one end pivotally mounted on said stud on said second pull link and having the other end engaging said main drive shaft means, said roller lever means being adapted to buckle said upper and lower links at the end of the first half of said machine cycle, said arm being adaptable to be engaged by and rotated by said stud on said second pull link to tension said upper and lower links.

14. The machine as claimed in claim 13 in which said differential actuator members have slots therein, transverse bars in said machine extending through said slots to guide said differential actuator members, gear rack means formed on said differential actuator members, first gears in mesh with said gear rack means, adjusting rail means moveably mounted in the machine and adapted to be inserted in tooth spaces of said first gears to lock said first gears and to slightly laterally shift said differential actuator members to provide some free space between said abutment means and the said pins of the first and second groups to enable said switching members to be lowered.

15. The machine as claimed in claim 14 further com' prising: a decade shifting key and means responsive to actuation thereof to move said pin carriage at least one place to the right relative to said switching members, after said abutment means are clear of the pins of said first and second groups and said levelling plate is in its upper position.

16. The machine as claimed in claim 15 further comprising an additional set pin controlled mechanism in the form of a rounding off mechanism positioned to the extreme right of said differential actuator members and having a decade transfer means connected therewith, said decade transfer means being adaptable to increase the count of the next lowest place in said accumulator means by one in response to said rounding off mechanism being moved more than five units.

17. A calculating machine comprising in combination; a frame, a ten key keyboard having numeral keys therein, a pin carriage shiftably mounted in said frame beneath said keyboard, a first and a second group of settable' pins mounted in rows in said pin carriage and said first group being adapted to be actuated and set by said numeral keys, accumulator means, a mechanism for each row of the pins of said first group of pins operable to transmit the representation of digits from the set pins of said first group of pins to said accumulator means and also operable to transmit the representation of digits in the accumulator means therefrom to said second group of pins, each said mechanism comprising a reciprocable differential actuator member operatively associated with said accumulator means and a switching member pivotally connected thereto, and disposed beneath said pin carriage, abutment means on said switching members adapted to engage set pins of said first group of pins for determining the actuated position of each said mechanism during a machine cycle, mean-s on said switching member for setting the pins of a row of said second group of pins in conformity with the actuated position of the pertaining mechanism, and means for actuating said mechanisms.

18. A calculating machine comprising in combination; a frame, a ten key keyboard having numeral keys therein, a pin carriage shiftably mounted in said frame beneath said keyboard, a first group of settable pins yieldably mounted in rows said pin carriage and adapted to be actuated and set by said numeral keys, accumulator means, amechanism for each row of pins and adapted to transmit the representations of digits from the set pins of said first group to said accumulator means, means to drive said mechanisms, a second group of settable pins mounted in said pin carriage adapted to receive the representations of digits in said accumulator means automatically from said mechanisms, each said mechanism comprising a differential actuator bar reciprocable in said machine and a switching member pivoted thereto and disposed beneath said pin carriage, said switching member comprising abutment means adapted to abut against the pins of said first and second groups of pins, knee joint means adapted to slidably support said switching members and having a tensioned position in which the abutment means of said switching members will engage the pins of said first and second groups, said knee joint means further having a collapsed position in which abutment means of said switch members are positioned below said pins of said first and second groups of pins, and means to collapse and tension each said knee joint means, said switch members having a lifting surface thereon with a shoulder at one end, said shoulder forming said abutment means, said lifting surfaces being adaptable to engage and set the pins of said second group as said knee joint means is tensioned, said differential actuator members being operatively associated with said accumulator means, said shoulders on said abutment members being adaptable to engage the pins of said first and second groups of pins and thereby transfer the representations of digits via said differential actuator members to and from said accumulator means.

19. The machine as claimed in claim 18 in which said means to collapse and tension said knee joint means comprises for independently operable means operatively associated with said knee joint means.

20. The machine as claimed in claim 18 in which the pins of said first group are yieldingly held in an upper position in said pin carriage and are adapted to be selectively projected downwardly from the underside of said pin carriage by depression of the pertaining numeral key, and said second group of pins are yieldably held in a lower position below said pin carriage and are projected upwardly when set by said lifting surfaces of said switching member to expose pins in said second group which correspond to the representations of digits in said accumulator means, said abutment means of said switching members being adaptable to engage the exposed pins of said second group on the next machine cycle.

21. The machine as claimed in claim 20 further comprising; a rearward transfer key, a levelling plate pivota-lly mounted in said frame above the pins of said second group and adapted to lower and thereby reset the pins of said second group at the end of the machine cycle, and means responsive to actuation of said rearward transfer key to prevent said levelling plate from being lowered as long as said rearward transfer key is depressed.

22. In a calculating machine of the ten digit key type, a frame, a keyboard, a laterally shiftable pin carriage mounted in said frame, a first group of settable pins mounted in laterally spaced rows in said pin carriage beneath said keyboard and adapted to be actuated and set by said digit keys, and a rearward transfer mechanism comprising; a second group of pins mounted in laterally spaced rows in said pin carriage and disposed laterally of said first group, accumulator means, a mechanism for each row of said first group of pins adapted to transmit the representations of digits from the set pins of said first group to said accumulator means, each said mechanism comprising a differential actuator member reciprocable longitudinally in said frame and a switching member piv oted thereto and disposed beneath said pin carriage, said differential actuator members being operatively connected to said accumulator means, drive means to drive said mechanisms, abutment means on said switching members to engage set pins of said first group and unset pins of said second group upon actuation of said mechanisms by said drive means, said second group of pins being adapted to be set by said switching members according to the representations of digits in said accumulator means when said carriage is shifted to dispose said first group of pins in the rest position thereof, knee joint means adapted to movably support said switching members at one end so as to move said one end vertically into and out of the range of engagement with the pins of said first and second groups of pins, and means to tension and buckle said knee joint means to effect said vertical movement of said switching members, said switching members being provided with lift surfaces disposable beneath the pins of said second group for setting of pins of said second group upon tensioning of said knee joint means, said switching members being adapted to engage the unset pins of said second group and thereby transfer to said accumulator means the representations of digits in said second group.

References Cited by the Examiner UNITED STATES PATENTS 2,834,542 5/1958 Sundstrand 235-60 2,850,231 9/1958 Uhlig 235-60 3,114,502 12/1963 Gelling 23560 3,130,904 4/1964 Haberkorn 235-60 FOREIGN PATENTS 497,833 12/ 1938 Great Britain.

LOUIS J. CAPOZI, Primary Examiner.

LEO SMILOW, Examiner.

T. J. ANDERSON, Assistant Examiner. 

1. A CALCULATING MACHINE COMPRISING IN COMBINATION; A FRAME, A TEN KEY KEYBOARD HAVING NUMERAL KEYS THEREIN, A PIN CARRIAGE SHIFTABLY MOUNTED IN SAID FRAME BENEATH SAID KEYBOARD, A FIRST AND A SECOND GROUP OF ROWS OF SETTABLE PINS MOUNTED IN SAID PIN CARRIAGE AND THE PINS OF SAID FIRST GROUP BEING ADAPTED TO BE ACTUATED AND SET BY SAID NUMERAL KEYS, ACCUMULATOR MEANS, A MECHANISM FOR EACH ROW OF THE PINS OF SAID FIRST GROUP OF PINS OPERABLE TO TRANSMIT THE REPRESENTATION OF DIGITS FROM THE SET PINS OF SAID FIRST GROUP OF PINS TO SAID ACCUMULATOR MEANS AND ALSO OPERABLE TO TRANSMIT THE REPRESENTATION OF DIGITS IN THE ACCUMULATOR MEANS THEREFROM TO SAID SECOND GROUP OF PINS, EACH SAID MECHANISM COMPRISING A DIFFERENTIAL ACTUATOR MEMBER OPERTAIVELY ASSOCIATED WITH SAID ACCUMULATOR MEANS AND A SWITCHING MEMBER CONNECTED THERETO, ABUTMENT MEANS ON SAID SWITCHING MEMBERS ADAPTED TO ENGAGE SET PINS OF SAID FIRST GROUP OF PINS FOR DETERMINING THE ACTUATED POSITION OF EACH SAID MECHANISM DURING A MACHINE CYCLE, MEANS ON SAID SWITCHING MEMBER FOR SETTING THE PINS OF A ROW OF SAID SECOND GROUP OF PINS IN CONFORMITY WITH THE ACTUATED POSITION OF THE PERTAINING MECHANISM, AND MEANS FOR ACTUATING SAID MECHANISMS. 